Home / 15,501.88-21,392.81-8,428.29

Finding the Fourth Proportional to 15,501.88, 21,392.81 and 8,428.29

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Solution

The fourth proportional to 15,501.88, 21,392.81 and 8,428.29 is: 11,631.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,501.88 : 21,392.81 = 8,428.29 : x
  2. Step 2: Convert to fraction form
    15,501.88/21,392.81 = 8,428.29/x
  3. Step 3: Cross multiply
    15,501.88x = 21,392.81 × 8,428.29
  4. Step 4: Simplify right side
    15,501.88x = 180,304,806.59
  5. Step 5: Solve for x
    x = 180,304,806.59/15,501.88
  6. Step 6: Final answer
    x = 11,631.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.